Do you mind elaborating why the drag drop will not work on your project?

Currently, hierarchy table with client binding support is planned for the next major version of WebGrid. You could aslo bind hieararchical data using numerous data source, however in some data source you will need to define the object relation in outbound mode as discussed in this thread.

Our online documentation is currently offline, you need to open the provided WebGrid documentation with the WebUI Studio installation to lookup the article.

You can iterate the collection using for loop. Here is a simple snippet to update a Component column for a specific row:

function Grid_BatchUpdating(gridObject, rowChanges) {
    debugger;
            
    for (var i in rowChanges) {
        currRow = rowChanges[i];
        if (currRow.NewObject.BugId == "2875")
            currRow.NewObject.Component += "-rev";
    }
}

You could analyse the structure in more detail using the debugger. As shown in the snippet above, you could modify the data using the NewObject property and column information.  

Re-testing the workaround in the latest build of WebTextEditor, I encounter the same issue. Based on on my discussion with the developer, the snippet must be modified to work in the latest build of WebTextEditor, here is the modified snippet:

function WebTextEditor_OnInitialize(controlId) {
    var WebTextEditor = ISGetObject(controlId);

    setTimeout(function () {
        WebTextEditor.SwitchToPreview();

        setTimeout(function () {
            var previewText = WebTextEditor.GetPreviewIFrameElement().contentWindow.document.body.innerHTML;

            WebTextEditor.SwitchToDesignView(true);
            WebTextEditor.SetValue(previewText);

            WebTextEditor.GetPreviewTabElement().style.display = "none";

            var hiddenToolBar = ["cmdInsertLabel", "cmdPreview", "cmdSendMail", "cmdSeparator4", "cmdSeparator5"];

            for (var i = 0; i < hiddenToolBar.length; i++) {
                var toolbarElem = document.getElementById(WebTextEditor.ToolBar[1].Name + "_" + hiddenToolBar[i]);
                toolbarElem.style.display = "none";
            }
        }, 500);

    },500);
}

You will need to set another delay before invoking the SwitchToPreview method.

Have you tried the suggested solution in the thread you mention?

The workaround is invoking a refresh client side method after calling the PerformBatchUpdate. Here is the snippet:

protected void Button1_Click(object sender, EventArgs e)
{
    WebGrid1.PerformBatchUpdate(true, false);
    Page.ClientScript.RegisterStartupScript(this.GetType(), "RefreshGrid", "<script>RefreshGrid()</script>");
}

Refresh client side method:

function RefreshGrid() {
    var grid = ISGetObject("WebGrid1");
    grid.Refresh();
}

One of our WebDesktop sample already demonstrate theming using ISL files. The sample could be lauched from page MyWebDesktop.aspx. In order to modify the style use the "Change Desktop Style" shortcut. You could analyse the sample to know more about ISL, the theme file is located on the Themes folder.

However, in the shipped provided sample the project is missing istheme.config file. I have attached the missing file in this post. Please copy this file to the WebDesktop sample project root folder.